import pygame.font
from pygame.sprite import Group

from ship import Ship


class Scoreboard():
  """A class to report scoring information."""

  def __init__(self, ai_settings, screen, stats):
    """Initialize scorekeeping attributes."""
    self.screen = screen
    self.screen_rect = screen.get_rect()
    self.ai_settings = ai_settings
    self.stats = stats

    # Font settings for scoring information.
    self.text_color = (30, 30, 30)
    self.font = pygame.font.SysFont(None, 48)

    # Prepare the initial score images.
    self.prep_score()
    self.prep_high_score()
    self.prep_level()
    self.prep_ships()

  def prep_score(self):
    """Turn the score into a rendered image."""
    rounded_score = int(round(self.stats.score, -1))
    score_str = "{:,}".format(rounded_score)
    self.score_image = self.font.render(score_str, True, self.text_color,
                                        self.ai_settings.bg_color)

    # Display the score at the top right of the screen.
    self.score_rect = self.score_image.get_rect()
    self.score_rect.right = self.screen_rect.right - 20
    self.score_rect.top = 20

  def prep_high_score(self):
    """Turn the high score into a rendered image."""
    high_score = int(round(self.stats.high_score, -1))
    high_score_str = "{:,}".format(high_score)
    self.high_score_image = self.font.render(high_score_str, True,
                                             self.text_color, self.ai_settings.bg_color)

    # Center the high score at the top of the screen.
    self.high_score_rect = self.high_score_image.get_rect()
    self.high_score_rect.centerx = self.screen_rect.centerx
    self.high_score_rect.top = self.score_rect.top

  def prep_level(self):
    """Turn the level into a rendered image."""
    self.level_image = self.font.render(str(self.stats.level), True,
                                        self.text_color, self.ai_settings.bg_color)

    # Position the level below the score.
    self.level_rect = self.level_image.get_rect()
    self.level_rect.right = self.score_rect.right
    self.level_rect.top = self.score_rect.bottom + 10

  def prep_ships(self):
    """Show how many ships are left."""
    self.ships = Group()
    for ship_number in range(self.stats.ships_left):
      ship = Ship(self.ai_settings, self.screen)
      ship.rect.x = 10 + ship_number * ship.rect.width
      ship.rect.y = 10
      self.ships.add(ship)

  def show_score(self):
    """Draw score to the screen."""
    self.screen.blit(self.score_image, self.score_rect)
    self.screen.blit(self.high_score_image, self.high_score_rect)
    self.screen.blit(self.level_image, self.level_rect)
    # Draw ships.
    self.ships.draw(self.screen)
